CA1188198A - Sleeve-type fluid flow diverter - Google Patents
Sleeve-type fluid flow diverterInfo
- Publication number
- CA1188198A CA1188198A CA000405037A CA405037A CA1188198A CA 1188198 A CA1188198 A CA 1188198A CA 000405037 A CA000405037 A CA 000405037A CA 405037 A CA405037 A CA 405037A CA 1188198 A CA1188198 A CA 1188198A
- Authority
- CA
- Canada
- Prior art keywords
- sleeve
- housing
- diverter valve
- ports
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L45/00—Pipe units with cleaning aperture and closure therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
- F16K11/0856—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in more than one plane perpendicular to the axis of the plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/065—Construction of housing; Use of materials therefor of taps or cocks with cylindrical plugs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86839—Four port reversing valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cleaning In General (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
SLEEVE-TYPE FLUID FLOW DIVERTER
ABSTRACT OF THE DISCLOSURE
A fluid flow diverter includes a housing and a rotatable sleeve mounted for rotation on an axle and spaced inwardly from the housing walls . The sleeve and housing include ports which are selectively positioned in registered or unregistered rela-tionship, depending upon which of two operative positions the sleeve assumes. The sleeve forms a single internal chamber through which fluid always flows in the same direction in both operative positions of the sleeve. The space between the sleeve and housing also forms a single chamber through which fluid always flows in the same direction in both opera-tive positions of the sleeve. The unidirectional fluid flow through the sleeve itself is opposite to the unidirectional fluid flow through the external chamber between the housing and sleeve. The supporting connection between the cylindrical sleeve and housing walls occurs adjacent the registered sleeve and housing ports by means of mating peripheral supporting surfaces . In either position of the sleeve, the unused or unregistered sleeve ports face the interior wall of the housing with their supporting surfaces spaced therefrom.
A filler member is mounted to the housing interior wall adjacent the position of each unregistered sleeve supporting surface. In actual use of a diverter in connection with a tube type heat exchanger or similar process device, there will be a fluid pressure differential between the supply and return sides within the diverter itself, due to the pressure drop caused by the tube restrictions. The supply side will have a higher pressure than the return side. The result is that water from the supply side will tend to flow through the narrow gaps between the sleeve supporting surfaces and the housing supporting surfaces and/or the filler members in a direction from the supply or high pressure side toward the return or low pressure side. The direction of flow through the gaps will be the same for both rotary positions of the sleeve, due to the aforementioned unidirectional fluid flow.
Any loose particles or corrosion products which may appear at the various gap interfaces will tend to be washed through to the outer side and not get stuck.
ABSTRACT OF THE DISCLOSURE
A fluid flow diverter includes a housing and a rotatable sleeve mounted for rotation on an axle and spaced inwardly from the housing walls . The sleeve and housing include ports which are selectively positioned in registered or unregistered rela-tionship, depending upon which of two operative positions the sleeve assumes. The sleeve forms a single internal chamber through which fluid always flows in the same direction in both operative positions of the sleeve. The space between the sleeve and housing also forms a single chamber through which fluid always flows in the same direction in both opera-tive positions of the sleeve. The unidirectional fluid flow through the sleeve itself is opposite to the unidirectional fluid flow through the external chamber between the housing and sleeve. The supporting connection between the cylindrical sleeve and housing walls occurs adjacent the registered sleeve and housing ports by means of mating peripheral supporting surfaces . In either position of the sleeve, the unused or unregistered sleeve ports face the interior wall of the housing with their supporting surfaces spaced therefrom.
A filler member is mounted to the housing interior wall adjacent the position of each unregistered sleeve supporting surface. In actual use of a diverter in connection with a tube type heat exchanger or similar process device, there will be a fluid pressure differential between the supply and return sides within the diverter itself, due to the pressure drop caused by the tube restrictions. The supply side will have a higher pressure than the return side. The result is that water from the supply side will tend to flow through the narrow gaps between the sleeve supporting surfaces and the housing supporting surfaces and/or the filler members in a direction from the supply or high pressure side toward the return or low pressure side. The direction of flow through the gaps will be the same for both rotary positions of the sleeve, due to the aforementioned unidirectional fluid flow.
Any loose particles or corrosion products which may appear at the various gap interfaces will tend to be washed through to the outer side and not get stuck.
Description
3;~
` 1-SLEEVE-TYPE FI.UID F'LOI~ I:)IVER'I'ER
U . S . PRIOR _ARI` OF INTEREST
Patent No~ Inventor Issued . .
s 3,319,710 Heeren et al. May. 16, 1967 3r973~592 Cleaver et al. Aug. 10, 1976 This invention relate~ to a sleeve-type fluid flow diverter, particularly for use in the cleaning of tubin~ of heat exchangers.
It has previously been suggested that heat exchanger tuhin~ may be internall~ cleaned by mounting brush-~asket assemblies on the ends of the tubes, and then by flowing fluid first in one direction and then the other to cause the brushes to traverse the length of the tubes and then return to their original position. See the above-identified U.S. Patent No.
! 3,319,710 It has also previously been suggested as in the 20 above-identified U.S. Patent 3,973,592 to utilize a four-wa~
valve for purposes of reversing fluid flow within the tubes to cause the cleanin~ brushes to move in both directions within the tubes.
It is also broadl~ known to utilize a sleeve-type 25 diverter to reverse the fluid flow within the tubes. This known device incorporated a ~enerally cylindrical sleeve rotatabl~
mounted in an outer housin~. The housing provided annular ring type support bearin~ surfaces for ~he ends and center portion of the sleeve and also included four ports for connection throu~h 3U conduits to a source of cooling fluid and to the heat exchanger.
On one side of the sleeve axis, a first pair of housing ports for supply and retu~n, were provided for connection to the source of coolin~ fluid- On the opposite side of the axis, and in line with the supply and return por~s r a second pair of housin~ ports 35 was provided, each of which could be selectively connected to either the inlet or outlet of the heat exchanger, depending on the rotary position of the sleeve.
`~
The sleeve body of -the prior diverter included a large plurali-ty of ports adapted to selec-tively regis-ter with the housing ports. Connec-tor conduits disposed within the sleeve and of a diameter a-t least as yreat as the housing and sleeve por-ts served -to form a plurali-ty of internal sleeve chambers and to connec-t the firs-t and second housing ports.
In each of the two rotary positions of the sleeve, fluid flowed from the housing supply por-t and ei-ther -through or around one of the sleeve's internal conduits to one of the second pair of housing ports. At the same time, fluid flowed from the other of the second pair of housing ports and either through or around the other of the sleeve's in-ternal conduits to the housing return por-t. Rotation of the sleeve 90 reversed the flow at the second pair of housing ports, although the flow at the supply and return housing ports remained the same.
In the above described known sleeve-type diverter, it was found that the large restriction within -the sleeve, caused ! by the connector conduits, caused an undesirab'.e pressure drop in the fluid flowing around a particular conduit. In addit.ion, it was found that binding sometimes occurrea between the annular suppcrt bearing surfaces and the sleeve wall, thus making it difficult to install or rotate the sleeve. Aside from con-siderations of manufacturing tolerances, this binding was believed - to be at least partially due to corrosion and sticking of par-ticles occurring at the continuously mating interfaces between the bearing surfaces and sleeve.
It i5 a task of the present invention to solve the aforementioned problems and to provide a sleeve--type diverter which substantially reduces pressure drop as well as binding difficulties, and is also more economical to manufacture.
In accordance with one aspect of -the invention, the rotatable sleeve is mounted Eor rota-tion on an axle means and is spaced inwardly from the housing walls. The sleeve forms a single internal chamber throu~h which fluid always flows in the same direction in both operative positions of the sleeve. The space between the sleeve and housing also forms a single chamber through which fluid always flows in the same direction in both operative posltions of the sleeve. The unidirectional fluid flow -through the sleeve itself is opposite to -the unidirec-tional fluid flow -through the ex-ternal chamber between the housing ancl sleeve. The only restriction to fluid flow within the sleeve is the sleeve axle means which has a substantia]ly smaller cross-sectional area than that of the sleeve and housing ports thus reducing pressure drop to a minimunl.
Likewise the length of the cross-sectional area between the inner sleeve and housing is much larger than the cross-sectional area of a connected port thus contributing very little to pressure drop.
In accordance wi-th another aspect of the invention - the supporting connection between -the cylindrical sleeve and housing walls occurs adjacent the registered sleeve and housing ports by means of ma-ting peripheral surfaces. The machining of the surfaces can be such as to provide for a substantially close fit. In addition in either position of the sleeve the unused or unregistered sleeve ports face the interior wall of the housing with their supporting sur-faces spaced therefrom. A filler member is mounted to the housing interior wall adjacent the position of each unregis-tered sleeve supporting surface and is formed to also provide a close fit therewith. The total area of contact between the various surfaces is less than the contacting bearing surfaces of the prior known sleeve-type diverter thus reduc-ing binding due to tolerance problems.
In actual use of a diverter in connection with a tube type heat exchanger or similar process device there will be a fluid pressure differential between the supply and return sides within the diverter itself due to the pres-sure drop caused by the tube restrictions. The supply side will have a higher pressure than the return side. The result is that water from the supply side will tend to flow through the narrow gaps between the sleeve supporting surfaces and the housing supporting surfaces and/or the filler members in a direction from the supply or high pressure side toward ~ a-~
-the return or .Low pressure sicle. The dlrection of flow -through the gaps wi.11 be the same for both rotary positions o the sleeve, due t.o the aforemen-tioned unidirectional fluid flow. Any loose particles of corrosion produc-ts which may appear at -the various gap in-terfaces will tend to be washed through to the other side and not get stucl~. Freely exposed contact surfaces will also be continuously washed, whe-ther the sleeve is in or between its operating positions. This also will reduce problems of binding.
BRIEF DESCRIPTION OF THE D~AWING_ The accompanying drawings illustrate the best mode presently contemplated by the inventors for carrying out the invention.
In the drawings:
FIG. 1 is a schema-tic showing of a heat exchange system to which the fluid flow diverter of the present inven-tion may be applied;
FIG. 2 is a central vertical section of a previously known sleeve-type fluid flow di.ver-ter, shown in normal flow position;
FIG. 3 is a view of the diverter of FIG. 2 in re-verse flow position;
FIG. 4 is a transverse section taken on line 4-4 of FIG. 3;
F'IG. 5 is a perspective view of the fluid flowdiverter of the present invention;
FIG. 6 is an exploded view of the diverter of FIG.
5 with the internal sleeve shown in reverse flow position;
FIG~ 7 is a central vertical section of the diver-ter, shown in norl~.al ~low position;
FIG. 8 is a view similar to FIG~ 7, wi-th the diver-ter in reverse flow position;
FIG. 9 is a transverse section taken on line 9-9 of FIG. 7i FIG. 10 is a fragmentary sec-tional view of a mating sleeve nozzle flange and hous:ing port gasket, with the gc~p exaggerated;
F'IG. 1] is a fragmentary sectional view of a mati.ng sleeve nozzle flange and filler plate, with the gap exagger-ated; and - 4a -FIGS. 12-15 are vertical sections taken on the respec-tive section lines in FIGS. 7 and 8.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The fluid flow diver~er 1 of the invention is shown schematically in FIG. 1 and may be utilized in connection with a process device such as a heat exchange condenser 2 having plurality of tubes 3 -therein. Diverter 1 norm~lly supplies cooling water from a fluid source 4 such as a lake or the like and flow thereof is continuously generated by a pump 5.
The diverter is connected to pump 5 and source 4 through a suit-able fluid supply line 6, and also to source 4 by a suitable return line 7. ~ pair of lines 8 and 9 connect diverter 1 to condenser 2 in the conventional manner~ Diverter 1 is actuat able to reverse the flow in lines 8 and 9 so that tube cleaning brushes, not shown, can shuttle back and forth in condenser tubes 3 from time to time.
~IGS. 2-4 illustrate a previously kno~n form of sleeve-type fluid flow diverter la, as heretoEore discussed.
Diverter la includes a housing 10 comprising a cylindrical wall 11 enclosed by end walls 12 and 13 which are secured thereto as by bolts 14. A sleeve 15 is disposed concentrically within housing 10 and comprises a cylindrical wall 16 enclosed by ena caps 17 and 18. Sleeve 15 is adapted to be rotatable within housing 10 and for this purpose/ stub shafts 19 and 20 extend axially outwardly from sleeve-end caps 17 and 18 and are received ~7ithin bearings 21 and 22 on housing end walls 12 and 13~ Shaft 19 extends beyond bearing 21, through a cover 23, and is connected to means for rotatin9 the shaft and sleeve through a suitable arc, such as 90 . In the shown embodiment, this means comprises a pinion 24 on shaft 19 which meshes with a rack 25 which in turn is suitably reciprocated by a pneumatic cylinder 26 through any suitable well-kno~n control mechanism, not shown.
The cylindrical wall 16 of sleeve 15 is supported by annular bearing rings 27, 28 and 29 which are secured to hous;ng wall 11 as by welding. The inner faces of bearing rings 27-29 LW~
are engaged by ~all 16 at the wall ends and middle, and normally permit slidin~ of wall 16 thereover durirlg rotative repo-si.tioning of sleeve 15. As can be seen in FIGS. 2 and 3, the bearing rinys separate -the space between walls 11 ~nd 16 into a pair of separate side~by-side chambers.
It should be noted t.hat a relatively large area of contac-t exists between bearing rings 27-29 and sleeve wall 16.
The cylindrical wall 11 of housing l~ is provided with a pair of ports 30 and 31 which are upstream in the loop formed with source 4 and condenser 2 (see FIG. 1)~ Ports 30 and 31 are provided with flanged sleeves 32 and 33 which are connected through lines 6 and 7 to source 4, and always func~
tion as supply and return ports respectively. Similarly, wall lS 11 includes a pair of downstream diverter ports 34 and 35 having flanged sleeves 36 and 37 connected throu~h lines 8 and 9 to condenser 2. As shown, the upstream and downstream port pairs are diametrically opposed~
Sleeve 15 is constructed to carry incoming fluid from supply port 30 to one of the downstream ports 34 or 35, and to carry return fluid from the other downstream port 34 or 35 back to return port 31. For this purpose, sleeve wall 16 is provided with eight ports 38-45 positioned on its surface as shown. Ports 38 and 39 ~re shown as diametrically opposed in a transverse plane and are sealin~ly joined by a flow pipe 46 which is also connected to sleeve end cap 18 by struts ~7.
A second flow pipe 48 connects at one end to port 44 and extends toward pipe 46 at an angle of approxim~tely 45 to the axis of rotatiOn 49 of sleeve 15, with its terminus 50 connected to pipe 48 and sleeve wall 16 so that it opens into port 43.
Pipe 43 is connected to sleeve end cap 17 by a rod 51.
In the normal flow position shown in FIG. 2, supply fluid will flow frorn source 4 ar~d line 6, through sleeve 32 and ports 30 and 38, through pipe 46 ~7ithin sleeve 15, through ports 39 and 34, and hence through sleeve 36 and line 3 to condenser 2. Return fluid from the condenser will flow in ~ 3~
throuyh line 9, throu~h sleeve 37 and ports 35 and 41, diametrically throùgh the interior of sleeve 15 and around pipes 46 and 48, out through ports ~0 and 31, and hence through sleeve 33 and line 7 and back to source qO
In the reverse flow position shown in ~IG. 3, supply fluid will flow from source 4 and line 6, diagonall~
through the interior of sleeve 15 and around pi.pes ~6 and 48 Ollt through ports 45 and 35, and hence through s.leeve 37 and line 9 to condenser 2. Return fluid from the condenser will flow in through line 8, through sleeve 36 and ports 3~ and 43, through sleeve 15 to pipe 48 and diayonall~ throucJh the latter to ports 44 and 31, and hence through sleeve 33 and line 7 and back to source 4. The two flow paths form a gener-ally X-shaped contour.
It should be noted that in both operating positions of sleeve lS~ fluid is forced to ~low around pipes 46 and 48 within the sleeve, said pipes being generally as larye in diameter as the sleeve ports. Since the diameter of these ports is ~enerally about equal to 1/2 the sleeve length, the pipes present a relatively large mass within the sleeve interior.
Turning now to the improved diverter 1 oE the present invention, and referring to FIGS.5-9, the diverter includes an enclosed housing 52 comprising an elongated longitudinal 2S cylindrical wall 53 enclosed by end ~alls 54 and 55 which, unless integral therewith, are secured the~eto in any suitable manner, such as by bolts 56. A sleeve 57 is disposed concen-trically within housing 52 and comprises an elongated longi-tudinal cylindri.cal wall 58 enclosed by end caps 59 and 60 to form a single internal chamber 57a- The sleeve wall and end caps are spaced substantially inwardly from the housiny wallsr thus forminy a sirlsle chamber 61 open from end to end. Sleeve 57 is adapted to be rotatable within housin9 52, about an axial support means. In the present embodiment, this means com-prises a shaft~like axle 62 coextensive with the diverter axis 63 and fixed to and extendin~ through end caps 59 and 60.
o~ sleeve 57. The ends of axle 62 are journalled in bearings 6~ and 65 which are mounted to housing end ~alls 5~ and 55 exteriorly of the sleeve. ~xle 62 extends beyond bearing 64 and is connected to means for rokating the axle and sleeve through a suitable arc, such as 90 , between a pair of oper-ative positions. This means may also comprise a pinion 66, rack 67 and a motive means such as a suitably actuatable pneumatic cylinder 68.
The c~lindrical wall 53 o~ housing 52 is provided with a pair of axially spaced ports 69 and 70 which are up-stream in the loop formed with source ~ and Gondenser 2>
(See FI~ l.) Ports 69 and 70 are provided with flanged sleeves 71 and 72 which are connected in the usual well known manner to lines 6 and 7, and hence to source 4. Ports 69 and 70 function as supply and return ports. Similarly, housing wall 53 includes a pair of axially spaced downstream ports 73 and 74 having flanged sleeves 75 and 76 connected through lines 8 and 9 to condenser 2.
While the in line upstream and downstream port pairs are shown as diametrically opposed, they need not necessaril~
be so positioned.
In the present embodiment, and in either position of sleeve 57, sleeve chamber 57a is constructed to carry incoming fluid from supply port 69 to one of the downstream ports 73 or 74, and chamber 61 is constructed to carry return fluid from the other downstream port 73 or 74 back to return por1 70~ For this purpose, sleeve wall 58 is provided with four ports 77-80. Ports 77, 78 and 79 form a trio of circumfer-entially spaced openings dis~osed generally diametrically in line with upstream supply port 6~ and do~nstream port 73 of housing 52. Port 80 forms a single opening disposed gen-erally trans~ersely in line with upstream return port 70 and downstream port 74 of housing 52, and longitudinally spaced rom the trio of ports.
As best shown in FIGS. 7 and 8 t axle 62 is sub-stantially less in cross sectional area than the cross sectional area o any of the sleeve or housing ports.
~ 3~
Means are provided to support sleeve wall 58 and to generally isolate the intlrior o~ the sleeve from chamber 61 ~hen the sleeve is in its two operative positions as shown in FIGS. 7 and 8. E`or this purpose, each sleeve port 77, 7~, 79 and 80 is provided with a radially outwardly e~.tending sleeve-like annular stub nozzle 81, 82, 83 and 84 respectively.
Nozzles 81, 82, 83 and 84 function as connectors and are pro-vided with peripheral flanges 85, 86l 87 and 8~ respectivel~.
In addition~ one upstream housing port 69 is provided with a peri.pheral gasket 89, while both dot~nstream housing ports 73 and 74 are also provided with respective peripheral gaskets 90 and 91. Gaskets 89-91 are disposed on the inner housin~
wall within chamber 61. No gasket is necessary for the other - housing port 70, as will be seen.
Depending upon the operative position of sleeve 57, sleeve stub nozzle 1anges 85-88 are adapted to selectively mate with housing port gaskets 89-91. For example, as shown in the normal ~low sleeve position of FIG. 7, nozzle flange 85 mates with gasket 89 and nozzle flange 86 mates with ~asket 90. In the reverse flow position of FIG. 8,.nozzle flange 87 mates with gasket 89 while noæzle flange 88 mates with gasket 91 The mating surfaces of flanges 85-a8 and gaskets 8~-91 are preferably precision machined to quite close tol-erances commensurate with the need to install and rotate sleeve 57. The gap or space S' between mating elements should probably be no more than about .020 inch. See FIG. 10 with the space S t ~reatly exaggerated~
As best shown in FIGS. 7, 8, and 12-14, in any glven operative sleeve position, at least one sleeve port is not in registry with a housing port and the unregistered sleeve port nozzle faces the housing ~all 58. For example, in the normal 1OW position of FIGS. 7, 12 and 13~ sleeve ports 79 and 80 and their respective nozzles 83 and 8~ and flanges 87 and 88 face wall 58.. In the reverse flo~ position of FIGS~ 8, 1~ and 15, sleeve port 77 and ;ts noæzle 81 and flange 85 face wall 58.
To prevent major leakaqe between the unregistered sleeve ports and the interior o~ chamber 61, filler means are provided on the housin~ inner wall at the positions at which the unregistered sleeve ports are disposed from time to time.
In the present embodirnent, the filler means comprises a plur-ality of rectangular plates 92, 93 and 9~ mounted to the interior of housin~ wall 58. Plates 92 and 93 are disposed in line with ~pstream and downstream housing ports 69 and 73 and are circumEerentially spaced on opposite sides of axle 62. Plate 9~ is disposed in line with the other housing ports 70 and 74 and is spaced longitudinally from plate 93 on the same side oE axle 62.
The surfaces of plates 92 94 are also preferabl~
precision machined so that they will mate closely with the respective unregisterecl noz~le flange surfaces. The gaps or spaces S" between the mating surfaces are preferably abo~t the same size as the gaps or spaces S' between registering noz~le flanges and gaskets 89-91. See Fig. 11 with the space S" ~reatly exaggerated~
~e~erring again to FIGSo 7, 12 and 13 which illustrate sleeve 57 in its normal flow position, ports 69 and 77 are in registry, as are ports 73 and 78, thus connecting sleeve chamber 57a with lines 6 and 8. Housing ports 70 and 74 open freely into chamber 61 and connect the latter with lines 7 and 9. Sleeve ports 79 and 80 are out of registry and their respective nozzle flanyes 87 and ~8 are in mating engageme~t with plates 92 and 94. Under the influence of pump 5, pressurized supply fluid will flow from source 4 and line 6, through sleeve cham~er 57a ar.d including around axle 62, and hence to line 8 to condenser 2. Return fluid from the condenser will flow through line 9 and into chamber 61 and around the periphery and ends of sleeve 57, and hence to line 7 and source 4~ Fluid flow through sleeve ports 79 and 80 is basically blocked by plates 92 and 94.
Referring to FIGS. 8, 14 and 15 which illustrate sleeve 57 in its rotated reverse flow position~ ports 69 and 79 are in registry, as are porLs 74 and 80, thus connectiny sleeve chamber 57a with lines 6 and 9. ~lousing ports 70 and 73 open freely into chclmber 61 and connect the latter with lines 7 and 8. Sleeve ports 77 and 78 are out: of registry and their respective noz~le flanges 85 and 86 are in matin~
engagement with plates 93 and 92. Under the inEluence of pump 5, the flow of pressuri~ed fluid througil condenser 2 is now reversed. The supply fluid will flo~ from source 4 ~nd line 6, and again through the sleeve chamber 57a and past axle 62, and hence to line 9 and to condenser 2. Return fluid from the condenser will flow through line 8 and into chamber 61 and around the peripher~ and ends of sleeve 57, and hence to line 7 and source 4. Fluid flo~ through sleeve ports 77 and 7~ is basically blocked by plates 93 and 92.
The basic direction oE fluid flow through sleeve chamber 57a in both operative sleeve positions thereof is the same. This unidirectional flow characteristic for both o~erative sleeve positions is also true for chamber 61. How~
~ver, the flo~ direction through chamber 57a is generally opposite to the flow direction through chamber 61. In both instances, the body of sleeve 57 forms an isolating means which separates the two opposed fluid streams.
The sole restriction to fluid flow through sleeve 57 is axle 62 which, because of its previously discussed small cross-sectional area relative to the port areas r causes a neg-ligible pressure drop in fluid flow through the sleeve. Although in the opposite flow direction the fluid encounters the large sleeve surface in chamber 6], the length of the cross-sectlona area between inner sleeve 57 and housing 52 is much greater than the cross-sectional area of return port 70, so that here also pressure drop is kept to a minimum.
The present construction is such that the possi-bility of binding of sleeve 57 against rotation is substan-tially reduced. One method of reducin~ binding problems is to manufacture the parts forrnin~ the mating surfaces or corro-sion resist~nt material such as a copper-nickel alloy.
~urthermore, the walls forrning chamber 61, to which the mating surfaces are exposed, can be epoxy coated to inhibit corrosion. ~lso, keeping the total areas o~E contacting surfaces at a minimum, which has been done in this case, will also help reduce binding In addition, means are provided to continuously iElush or wash the contacting surfaces of sleeve no~le flanges 85-88, gaskets 89-~1 and plates 92-94 to thereby keep any possible products of corrosion from lodging on said surfaces and in spaces S t and S".
The present diverter device includes a supply chamber (sleeve chamber 57a in -the pre5ent embodiment) and a return chamber (61 in the present embodiment). Due to the normal pressure drop occurring in the downstream process device (condenser 2 in the present embodiment) the fluid pressure in the supply cham~er will be ~reater than that in the return chamber. This positive pressure will be applied to all restric-tive spaces S' and S" to cause fluid to flow th~ough the spaces from the supply or high pressure chamber to the return or low pressure chamber~ As shown, the flow is from chamber 57a to chamber 61. The amount of flow will be small and not enough to disrupt the operation of the diverter, but will be sufficient to continuously wash the mating surfaces. Since the flow in each chamber is always in the same airection, the direction of washing flow through spaces S' and S" will never reverse.
Further continuous washing by the main body of flow-ing fluid occurs as to any filler member plate which is not utilized and is freely exposed when sleeve 57 is in an operative position. For example, note plate 93 in FIG. 12 and plate 94 in FIG. 15~
In addition, all of the nozzle flange, gasket and plate precision sur~Eaces will be continuously washed by the main body of flowing fluid during intermittent shiftin~ of sleeve 57 between operative positions. Duriny this period, these surfaces will all be freely eY~posed to turbulent fluid as fluid is diverted ~.ithin the unit.
The ultimate result is a cleansing of the rela-tively shiftable contact surfaces to enhance and assuresleeve rotation over long per:iods, ~ lthough the present preEerred embodiment places housing port ~9 and sleeve chamber 57a on the suppl~ side and chamber 61 and housing port iO on the return side, the line connections to the diverter could be reversed if de--sired with a resultant reversal of internal function, ~ithout departing from the basic concepts of the invention.
` 1-SLEEVE-TYPE FI.UID F'LOI~ I:)IVER'I'ER
U . S . PRIOR _ARI` OF INTEREST
Patent No~ Inventor Issued . .
s 3,319,710 Heeren et al. May. 16, 1967 3r973~592 Cleaver et al. Aug. 10, 1976 This invention relate~ to a sleeve-type fluid flow diverter, particularly for use in the cleaning of tubin~ of heat exchangers.
It has previously been suggested that heat exchanger tuhin~ may be internall~ cleaned by mounting brush-~asket assemblies on the ends of the tubes, and then by flowing fluid first in one direction and then the other to cause the brushes to traverse the length of the tubes and then return to their original position. See the above-identified U.S. Patent No.
! 3,319,710 It has also previously been suggested as in the 20 above-identified U.S. Patent 3,973,592 to utilize a four-wa~
valve for purposes of reversing fluid flow within the tubes to cause the cleanin~ brushes to move in both directions within the tubes.
It is also broadl~ known to utilize a sleeve-type 25 diverter to reverse the fluid flow within the tubes. This known device incorporated a ~enerally cylindrical sleeve rotatabl~
mounted in an outer housin~. The housing provided annular ring type support bearin~ surfaces for ~he ends and center portion of the sleeve and also included four ports for connection throu~h 3U conduits to a source of cooling fluid and to the heat exchanger.
On one side of the sleeve axis, a first pair of housing ports for supply and retu~n, were provided for connection to the source of coolin~ fluid- On the opposite side of the axis, and in line with the supply and return por~s r a second pair of housin~ ports 35 was provided, each of which could be selectively connected to either the inlet or outlet of the heat exchanger, depending on the rotary position of the sleeve.
`~
The sleeve body of -the prior diverter included a large plurali-ty of ports adapted to selec-tively regis-ter with the housing ports. Connec-tor conduits disposed within the sleeve and of a diameter a-t least as yreat as the housing and sleeve por-ts served -to form a plurali-ty of internal sleeve chambers and to connec-t the firs-t and second housing ports.
In each of the two rotary positions of the sleeve, fluid flowed from the housing supply por-t and ei-ther -through or around one of the sleeve's internal conduits to one of the second pair of housing ports. At the same time, fluid flowed from the other of the second pair of housing ports and either through or around the other of the sleeve's in-ternal conduits to the housing return por-t. Rotation of the sleeve 90 reversed the flow at the second pair of housing ports, although the flow at the supply and return housing ports remained the same.
In the above described known sleeve-type diverter, it was found that the large restriction within -the sleeve, caused ! by the connector conduits, caused an undesirab'.e pressure drop in the fluid flowing around a particular conduit. In addit.ion, it was found that binding sometimes occurrea between the annular suppcrt bearing surfaces and the sleeve wall, thus making it difficult to install or rotate the sleeve. Aside from con-siderations of manufacturing tolerances, this binding was believed - to be at least partially due to corrosion and sticking of par-ticles occurring at the continuously mating interfaces between the bearing surfaces and sleeve.
It i5 a task of the present invention to solve the aforementioned problems and to provide a sleeve--type diverter which substantially reduces pressure drop as well as binding difficulties, and is also more economical to manufacture.
In accordance with one aspect of -the invention, the rotatable sleeve is mounted Eor rota-tion on an axle means and is spaced inwardly from the housing walls. The sleeve forms a single internal chamber throu~h which fluid always flows in the same direction in both operative positions of the sleeve. The space between the sleeve and housing also forms a single chamber through which fluid always flows in the same direction in both operative posltions of the sleeve. The unidirectional fluid flow -through the sleeve itself is opposite to -the unidirec-tional fluid flow -through the ex-ternal chamber between the housing ancl sleeve. The only restriction to fluid flow within the sleeve is the sleeve axle means which has a substantia]ly smaller cross-sectional area than that of the sleeve and housing ports thus reducing pressure drop to a minimunl.
Likewise the length of the cross-sectional area between the inner sleeve and housing is much larger than the cross-sectional area of a connected port thus contributing very little to pressure drop.
In accordance wi-th another aspect of the invention - the supporting connection between -the cylindrical sleeve and housing walls occurs adjacent the registered sleeve and housing ports by means of ma-ting peripheral surfaces. The machining of the surfaces can be such as to provide for a substantially close fit. In addition in either position of the sleeve the unused or unregistered sleeve ports face the interior wall of the housing with their supporting sur-faces spaced therefrom. A filler member is mounted to the housing interior wall adjacent the position of each unregis-tered sleeve supporting surface and is formed to also provide a close fit therewith. The total area of contact between the various surfaces is less than the contacting bearing surfaces of the prior known sleeve-type diverter thus reduc-ing binding due to tolerance problems.
In actual use of a diverter in connection with a tube type heat exchanger or similar process device there will be a fluid pressure differential between the supply and return sides within the diverter itself due to the pres-sure drop caused by the tube restrictions. The supply side will have a higher pressure than the return side. The result is that water from the supply side will tend to flow through the narrow gaps between the sleeve supporting surfaces and the housing supporting surfaces and/or the filler members in a direction from the supply or high pressure side toward ~ a-~
-the return or .Low pressure sicle. The dlrection of flow -through the gaps wi.11 be the same for both rotary positions o the sleeve, due t.o the aforemen-tioned unidirectional fluid flow. Any loose particles of corrosion produc-ts which may appear at -the various gap in-terfaces will tend to be washed through to the other side and not get stucl~. Freely exposed contact surfaces will also be continuously washed, whe-ther the sleeve is in or between its operating positions. This also will reduce problems of binding.
BRIEF DESCRIPTION OF THE D~AWING_ The accompanying drawings illustrate the best mode presently contemplated by the inventors for carrying out the invention.
In the drawings:
FIG. 1 is a schema-tic showing of a heat exchange system to which the fluid flow diverter of the present inven-tion may be applied;
FIG. 2 is a central vertical section of a previously known sleeve-type fluid flow di.ver-ter, shown in normal flow position;
FIG. 3 is a view of the diverter of FIG. 2 in re-verse flow position;
FIG. 4 is a transverse section taken on line 4-4 of FIG. 3;
F'IG. 5 is a perspective view of the fluid flowdiverter of the present invention;
FIG. 6 is an exploded view of the diverter of FIG.
5 with the internal sleeve shown in reverse flow position;
FIG~ 7 is a central vertical section of the diver-ter, shown in norl~.al ~low position;
FIG. 8 is a view similar to FIG~ 7, wi-th the diver-ter in reverse flow position;
FIG. 9 is a transverse section taken on line 9-9 of FIG. 7i FIG. 10 is a fragmentary sec-tional view of a mating sleeve nozzle flange and hous:ing port gasket, with the gc~p exaggerated;
F'IG. 1] is a fragmentary sectional view of a mati.ng sleeve nozzle flange and filler plate, with the gap exagger-ated; and - 4a -FIGS. 12-15 are vertical sections taken on the respec-tive section lines in FIGS. 7 and 8.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The fluid flow diver~er 1 of the invention is shown schematically in FIG. 1 and may be utilized in connection with a process device such as a heat exchange condenser 2 having plurality of tubes 3 -therein. Diverter 1 norm~lly supplies cooling water from a fluid source 4 such as a lake or the like and flow thereof is continuously generated by a pump 5.
The diverter is connected to pump 5 and source 4 through a suit-able fluid supply line 6, and also to source 4 by a suitable return line 7. ~ pair of lines 8 and 9 connect diverter 1 to condenser 2 in the conventional manner~ Diverter 1 is actuat able to reverse the flow in lines 8 and 9 so that tube cleaning brushes, not shown, can shuttle back and forth in condenser tubes 3 from time to time.
~IGS. 2-4 illustrate a previously kno~n form of sleeve-type fluid flow diverter la, as heretoEore discussed.
Diverter la includes a housing 10 comprising a cylindrical wall 11 enclosed by end walls 12 and 13 which are secured thereto as by bolts 14. A sleeve 15 is disposed concentrically within housing 10 and comprises a cylindrical wall 16 enclosed by ena caps 17 and 18. Sleeve 15 is adapted to be rotatable within housing 10 and for this purpose/ stub shafts 19 and 20 extend axially outwardly from sleeve-end caps 17 and 18 and are received ~7ithin bearings 21 and 22 on housing end walls 12 and 13~ Shaft 19 extends beyond bearing 21, through a cover 23, and is connected to means for rotatin9 the shaft and sleeve through a suitable arc, such as 90 . In the shown embodiment, this means comprises a pinion 24 on shaft 19 which meshes with a rack 25 which in turn is suitably reciprocated by a pneumatic cylinder 26 through any suitable well-kno~n control mechanism, not shown.
The cylindrical wall 16 of sleeve 15 is supported by annular bearing rings 27, 28 and 29 which are secured to hous;ng wall 11 as by welding. The inner faces of bearing rings 27-29 LW~
are engaged by ~all 16 at the wall ends and middle, and normally permit slidin~ of wall 16 thereover durirlg rotative repo-si.tioning of sleeve 15. As can be seen in FIGS. 2 and 3, the bearing rinys separate -the space between walls 11 ~nd 16 into a pair of separate side~by-side chambers.
It should be noted t.hat a relatively large area of contac-t exists between bearing rings 27-29 and sleeve wall 16.
The cylindrical wall 11 of housing l~ is provided with a pair of ports 30 and 31 which are upstream in the loop formed with source 4 and condenser 2 (see FIG. 1)~ Ports 30 and 31 are provided with flanged sleeves 32 and 33 which are connected through lines 6 and 7 to source 4, and always func~
tion as supply and return ports respectively. Similarly, wall lS 11 includes a pair of downstream diverter ports 34 and 35 having flanged sleeves 36 and 37 connected throu~h lines 8 and 9 to condenser 2. As shown, the upstream and downstream port pairs are diametrically opposed~
Sleeve 15 is constructed to carry incoming fluid from supply port 30 to one of the downstream ports 34 or 35, and to carry return fluid from the other downstream port 34 or 35 back to return port 31. For this purpose, sleeve wall 16 is provided with eight ports 38-45 positioned on its surface as shown. Ports 38 and 39 ~re shown as diametrically opposed in a transverse plane and are sealin~ly joined by a flow pipe 46 which is also connected to sleeve end cap 18 by struts ~7.
A second flow pipe 48 connects at one end to port 44 and extends toward pipe 46 at an angle of approxim~tely 45 to the axis of rotatiOn 49 of sleeve 15, with its terminus 50 connected to pipe 48 and sleeve wall 16 so that it opens into port 43.
Pipe 43 is connected to sleeve end cap 17 by a rod 51.
In the normal flow position shown in FIG. 2, supply fluid will flow frorn source 4 ar~d line 6, through sleeve 32 and ports 30 and 38, through pipe 46 ~7ithin sleeve 15, through ports 39 and 34, and hence through sleeve 36 and line 3 to condenser 2. Return fluid from the condenser will flow in ~ 3~
throuyh line 9, throu~h sleeve 37 and ports 35 and 41, diametrically throùgh the interior of sleeve 15 and around pipes 46 and 48, out through ports ~0 and 31, and hence through sleeve 33 and line 7 and back to source qO
In the reverse flow position shown in ~IG. 3, supply fluid will flow from source 4 and line 6, diagonall~
through the interior of sleeve 15 and around pi.pes ~6 and 48 Ollt through ports 45 and 35, and hence through s.leeve 37 and line 9 to condenser 2. Return fluid from the condenser will flow in through line 8, through sleeve 36 and ports 3~ and 43, through sleeve 15 to pipe 48 and diayonall~ throucJh the latter to ports 44 and 31, and hence through sleeve 33 and line 7 and back to source 4. The two flow paths form a gener-ally X-shaped contour.
It should be noted that in both operating positions of sleeve lS~ fluid is forced to ~low around pipes 46 and 48 within the sleeve, said pipes being generally as larye in diameter as the sleeve ports. Since the diameter of these ports is ~enerally about equal to 1/2 the sleeve length, the pipes present a relatively large mass within the sleeve interior.
Turning now to the improved diverter 1 oE the present invention, and referring to FIGS.5-9, the diverter includes an enclosed housing 52 comprising an elongated longitudinal 2S cylindrical wall 53 enclosed by end ~alls 54 and 55 which, unless integral therewith, are secured the~eto in any suitable manner, such as by bolts 56. A sleeve 57 is disposed concen-trically within housing 52 and comprises an elongated longi-tudinal cylindri.cal wall 58 enclosed by end caps 59 and 60 to form a single internal chamber 57a- The sleeve wall and end caps are spaced substantially inwardly from the housiny wallsr thus forminy a sirlsle chamber 61 open from end to end. Sleeve 57 is adapted to be rotatable within housin9 52, about an axial support means. In the present embodiment, this means com-prises a shaft~like axle 62 coextensive with the diverter axis 63 and fixed to and extendin~ through end caps 59 and 60.
o~ sleeve 57. The ends of axle 62 are journalled in bearings 6~ and 65 which are mounted to housing end ~alls 5~ and 55 exteriorly of the sleeve. ~xle 62 extends beyond bearing 64 and is connected to means for rokating the axle and sleeve through a suitable arc, such as 90 , between a pair of oper-ative positions. This means may also comprise a pinion 66, rack 67 and a motive means such as a suitably actuatable pneumatic cylinder 68.
The c~lindrical wall 53 o~ housing 52 is provided with a pair of axially spaced ports 69 and 70 which are up-stream in the loop formed with source ~ and Gondenser 2>
(See FI~ l.) Ports 69 and 70 are provided with flanged sleeves 71 and 72 which are connected in the usual well known manner to lines 6 and 7, and hence to source 4. Ports 69 and 70 function as supply and return ports. Similarly, housing wall 53 includes a pair of axially spaced downstream ports 73 and 74 having flanged sleeves 75 and 76 connected through lines 8 and 9 to condenser 2.
While the in line upstream and downstream port pairs are shown as diametrically opposed, they need not necessaril~
be so positioned.
In the present embodiment, and in either position of sleeve 57, sleeve chamber 57a is constructed to carry incoming fluid from supply port 69 to one of the downstream ports 73 or 74, and chamber 61 is constructed to carry return fluid from the other downstream port 73 or 74 back to return por1 70~ For this purpose, sleeve wall 58 is provided with four ports 77-80. Ports 77, 78 and 79 form a trio of circumfer-entially spaced openings dis~osed generally diametrically in line with upstream supply port 6~ and do~nstream port 73 of housing 52. Port 80 forms a single opening disposed gen-erally trans~ersely in line with upstream return port 70 and downstream port 74 of housing 52, and longitudinally spaced rom the trio of ports.
As best shown in FIGS. 7 and 8 t axle 62 is sub-stantially less in cross sectional area than the cross sectional area o any of the sleeve or housing ports.
~ 3~
Means are provided to support sleeve wall 58 and to generally isolate the intlrior o~ the sleeve from chamber 61 ~hen the sleeve is in its two operative positions as shown in FIGS. 7 and 8. E`or this purpose, each sleeve port 77, 7~, 79 and 80 is provided with a radially outwardly e~.tending sleeve-like annular stub nozzle 81, 82, 83 and 84 respectively.
Nozzles 81, 82, 83 and 84 function as connectors and are pro-vided with peripheral flanges 85, 86l 87 and 8~ respectivel~.
In addition~ one upstream housing port 69 is provided with a peri.pheral gasket 89, while both dot~nstream housing ports 73 and 74 are also provided with respective peripheral gaskets 90 and 91. Gaskets 89-91 are disposed on the inner housin~
wall within chamber 61. No gasket is necessary for the other - housing port 70, as will be seen.
Depending upon the operative position of sleeve 57, sleeve stub nozzle 1anges 85-88 are adapted to selectively mate with housing port gaskets 89-91. For example, as shown in the normal ~low sleeve position of FIG. 7, nozzle flange 85 mates with gasket 89 and nozzle flange 86 mates with ~asket 90. In the reverse flow position of FIG. 8,.nozzle flange 87 mates with gasket 89 while noæzle flange 88 mates with gasket 91 The mating surfaces of flanges 85-a8 and gaskets 8~-91 are preferably precision machined to quite close tol-erances commensurate with the need to install and rotate sleeve 57. The gap or space S' between mating elements should probably be no more than about .020 inch. See FIG. 10 with the space S t ~reatly exaggerated~
As best shown in FIGS. 7, 8, and 12-14, in any glven operative sleeve position, at least one sleeve port is not in registry with a housing port and the unregistered sleeve port nozzle faces the housing ~all 58. For example, in the normal 1OW position of FIGS. 7, 12 and 13~ sleeve ports 79 and 80 and their respective nozzles 83 and 8~ and flanges 87 and 88 face wall 58.. In the reverse flo~ position of FIGS~ 8, 1~ and 15, sleeve port 77 and ;ts noæzle 81 and flange 85 face wall 58.
To prevent major leakaqe between the unregistered sleeve ports and the interior o~ chamber 61, filler means are provided on the housin~ inner wall at the positions at which the unregistered sleeve ports are disposed from time to time.
In the present embodirnent, the filler means comprises a plur-ality of rectangular plates 92, 93 and 9~ mounted to the interior of housin~ wall 58. Plates 92 and 93 are disposed in line with ~pstream and downstream housing ports 69 and 73 and are circumEerentially spaced on opposite sides of axle 62. Plate 9~ is disposed in line with the other housing ports 70 and 74 and is spaced longitudinally from plate 93 on the same side oE axle 62.
The surfaces of plates 92 94 are also preferabl~
precision machined so that they will mate closely with the respective unregisterecl noz~le flange surfaces. The gaps or spaces S" between the mating surfaces are preferably abo~t the same size as the gaps or spaces S' between registering noz~le flanges and gaskets 89-91. See Fig. 11 with the space S" ~reatly exaggerated~
~e~erring again to FIGSo 7, 12 and 13 which illustrate sleeve 57 in its normal flow position, ports 69 and 77 are in registry, as are ports 73 and 78, thus connecting sleeve chamber 57a with lines 6 and 8. Housing ports 70 and 74 open freely into chamber 61 and connect the latter with lines 7 and 9. Sleeve ports 79 and 80 are out of registry and their respective nozzle flanyes 87 and ~8 are in mating engageme~t with plates 92 and 94. Under the influence of pump 5, pressurized supply fluid will flow from source 4 and line 6, through sleeve cham~er 57a ar.d including around axle 62, and hence to line 8 to condenser 2. Return fluid from the condenser will flow through line 9 and into chamber 61 and around the periphery and ends of sleeve 57, and hence to line 7 and source 4~ Fluid flow through sleeve ports 79 and 80 is basically blocked by plates 92 and 94.
Referring to FIGS. 8, 14 and 15 which illustrate sleeve 57 in its rotated reverse flow position~ ports 69 and 79 are in registry, as are porLs 74 and 80, thus connectiny sleeve chamber 57a with lines 6 and 9. ~lousing ports 70 and 73 open freely into chclmber 61 and connect the latter with lines 7 and 8. Sleeve ports 77 and 78 are out: of registry and their respective noz~le flanges 85 and 86 are in matin~
engagement with plates 93 and 92. Under the inEluence of pump 5, the flow of pressuri~ed fluid througil condenser 2 is now reversed. The supply fluid will flo~ from source 4 ~nd line 6, and again through the sleeve chamber 57a and past axle 62, and hence to line 9 and to condenser 2. Return fluid from the condenser will flow through line 8 and into chamber 61 and around the peripher~ and ends of sleeve 57, and hence to line 7 and source 4. Fluid flo~ through sleeve ports 77 and 7~ is basically blocked by plates 93 and 92.
The basic direction oE fluid flow through sleeve chamber 57a in both operative sleeve positions thereof is the same. This unidirectional flow characteristic for both o~erative sleeve positions is also true for chamber 61. How~
~ver, the flo~ direction through chamber 57a is generally opposite to the flow direction through chamber 61. In both instances, the body of sleeve 57 forms an isolating means which separates the two opposed fluid streams.
The sole restriction to fluid flow through sleeve 57 is axle 62 which, because of its previously discussed small cross-sectional area relative to the port areas r causes a neg-ligible pressure drop in fluid flow through the sleeve. Although in the opposite flow direction the fluid encounters the large sleeve surface in chamber 6], the length of the cross-sectlona area between inner sleeve 57 and housing 52 is much greater than the cross-sectional area of return port 70, so that here also pressure drop is kept to a minimum.
The present construction is such that the possi-bility of binding of sleeve 57 against rotation is substan-tially reduced. One method of reducin~ binding problems is to manufacture the parts forrnin~ the mating surfaces or corro-sion resist~nt material such as a copper-nickel alloy.
~urthermore, the walls forrning chamber 61, to which the mating surfaces are exposed, can be epoxy coated to inhibit corrosion. ~lso, keeping the total areas o~E contacting surfaces at a minimum, which has been done in this case, will also help reduce binding In addition, means are provided to continuously iElush or wash the contacting surfaces of sleeve no~le flanges 85-88, gaskets 89-~1 and plates 92-94 to thereby keep any possible products of corrosion from lodging on said surfaces and in spaces S t and S".
The present diverter device includes a supply chamber (sleeve chamber 57a in -the pre5ent embodiment) and a return chamber (61 in the present embodiment). Due to the normal pressure drop occurring in the downstream process device (condenser 2 in the present embodiment) the fluid pressure in the supply cham~er will be ~reater than that in the return chamber. This positive pressure will be applied to all restric-tive spaces S' and S" to cause fluid to flow th~ough the spaces from the supply or high pressure chamber to the return or low pressure chamber~ As shown, the flow is from chamber 57a to chamber 61. The amount of flow will be small and not enough to disrupt the operation of the diverter, but will be sufficient to continuously wash the mating surfaces. Since the flow in each chamber is always in the same airection, the direction of washing flow through spaces S' and S" will never reverse.
Further continuous washing by the main body of flow-ing fluid occurs as to any filler member plate which is not utilized and is freely exposed when sleeve 57 is in an operative position. For example, note plate 93 in FIG. 12 and plate 94 in FIG. 15~
In addition, all of the nozzle flange, gasket and plate precision sur~Eaces will be continuously washed by the main body of flowing fluid during intermittent shiftin~ of sleeve 57 between operative positions. Duriny this period, these surfaces will all be freely eY~posed to turbulent fluid as fluid is diverted ~.ithin the unit.
The ultimate result is a cleansing of the rela-tively shiftable contact surfaces to enhance and assuresleeve rotation over long per:iods, ~ lthough the present preEerred embodiment places housing port ~9 and sleeve chamber 57a on the suppl~ side and chamber 61 and housing port iO on the return side, the line connections to the diverter could be reversed if de--sired with a resultant reversal of internal function, ~ithout departing from the basic concepts of the invention.
Claims (24)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A diverter valve for connection between a source of pressurized fluid and a process device , com-prising, in combination:
(a) an enclosing housing having a longitudinally extending generally cylindrical wall and end walls (b) a sleeve disposed concentrically within said housing and with said sleeve having a longitudinally extending generally cylindrical wall and end caps (c) means mounting said sleeve coaxially within said housing, (d) motive means for rotating said sleeve between a pair of operative positions, (e) a pair of upstream supply and return ports disposed in said housing for connection to the fluid source, (f) a pair of downstream output and input ports disposed in said housing for connection to the process device, (g) multiple port means disposed in the said generally cylindrical wall of said sleeve for selectively connecting said housing supply and return ports to one or the other of said housing output and input ports depending upon the operation position of said sleeve, (h) said sleeve forming a single internal chamber connecting said multiple port means for flow of fluid through said internal chamber when at least some of said multiple port means register with one of said upstream and one of said down-stream housing ports, (i) said housing and sleeve being spaced to form a single external chamber therebetween, and with said external chamber extending about said wall and end caps of said sleeve, (j) and said external chamber providing for flow of fluid therethrough between one of said upstream and one of downstream housing ports in both operative positions of said sleeve.
(a) an enclosing housing having a longitudinally extending generally cylindrical wall and end walls (b) a sleeve disposed concentrically within said housing and with said sleeve having a longitudinally extending generally cylindrical wall and end caps (c) means mounting said sleeve coaxially within said housing, (d) motive means for rotating said sleeve between a pair of operative positions, (e) a pair of upstream supply and return ports disposed in said housing for connection to the fluid source, (f) a pair of downstream output and input ports disposed in said housing for connection to the process device, (g) multiple port means disposed in the said generally cylindrical wall of said sleeve for selectively connecting said housing supply and return ports to one or the other of said housing output and input ports depending upon the operation position of said sleeve, (h) said sleeve forming a single internal chamber connecting said multiple port means for flow of fluid through said internal chamber when at least some of said multiple port means register with one of said upstream and one of said down-stream housing ports, (i) said housing and sleeve being spaced to form a single external chamber therebetween, and with said external chamber extending about said wall and end caps of said sleeve, (j) and said external chamber providing for flow of fluid therethrough between one of said upstream and one of downstream housing ports in both operative positions of said sleeve.
2. The diverter valve of claim 1 wherein the gen-eral direction of fluid flow through each said internal and external chamber remains the same in both operative positions of said sleeve.
3. The diverter valve of claim 2 wherein the general direction of fluid flow through said internal chamber is the reverse of the general direction of fluid flow through said external chamber in both operative positions of said sleeve.
4. The diverter valve of claims 1, 2 or 3 wherein said sleeve wall and end caps form means to substan-tially isolate the fluid flow in each of said chambers from the fluid flow in the other of said chambers.
5. The diverter valve of claims 1, 2 or 3 wherein, in both operative positions of said sleeve:
(a) said internal chamber is connected to the same one of said upstream supply and return housing ports, (b) and said external chamber is connected to the same other one of said upstream supply and return housing ports.
(a) said internal chamber is connected to the same one of said upstream supply and return housing ports, (b) and said external chamber is connected to the same other one of said upstream supply and return housing ports.
6. The diverter valve of claim 1 wherein:
(a) said sleeve mounting means includes coaxially disposed shaft means rotatably connected to said housing end walls and with said shaft means being fixedly connected to said sleeve end caps and extending into said internal chamber, (b) said shaft means providing the sole restriction to fluid flow through said internal chamber.
(a) said sleeve mounting means includes coaxially disposed shaft means rotatably connected to said housing end walls and with said shaft means being fixedly connected to said sleeve end caps and extending into said internal chamber, (b) said shaft means providing the sole restriction to fluid flow through said internal chamber.
7. The diverter valve of claim 6 wherein the cross-sectional area of said shaft means is less than the area of any of said housing ports or said sleeve port means .
8. The diverter valve of claim 6 or 7 wherein the cross-sectional area of a said housing port is less than the length of the cross-sectional area of said external chamber.
9. The diverter valve of claim 1 wherein said multiple port means in said generally cylindrical wall of said sleeve comprises:
(a) a trio of circumferentially spaced openings disposed generally diametrically in line with one of said upstream and one of said downstream housing ports, (b) and a further opening disposed generally diame-trically in line with the other of said upstream and the other of said downstream housing ports, and with said further opening being longitudinally spaced from said trio of openings.
(a) a trio of circumferentially spaced openings disposed generally diametrically in line with one of said upstream and one of said downstream housing ports, (b) and a further opening disposed generally diame-trically in line with the other of said upstream and the other of said downstream housing ports, and with said further opening being longitudinally spaced from said trio of openings.
10. The diverter valve of claim 1 or 9 which in-cludes:
(a) radially extending connector means disposed between said sleeve and housing walls for selectively connec-ting said multiple port means with at least some of said upstream and downstream housing ports, (b) and connector sealing means disposed in said external chamber.
(a) radially extending connector means disposed between said sleeve and housing walls for selectively connec-ting said multiple port means with at least some of said upstream and downstream housing ports, (b) and connector sealing means disposed in said external chamber.
11. The diverter valve of claim 9 which includes:
(a) an annular connector extending radially from each of said sleeve port openings toward said housing in said external chamber, (b) and a sealing member disposed peripherally about at least some of said housing ports for engagement by said connectors upon registry of said opening with a said housing port.
(a) an annular connector extending radially from each of said sleeve port openings toward said housing in said external chamber, (b) and a sealing member disposed peripherally about at least some of said housing ports for engagement by said connectors upon registry of said opening with a said housing port.
12. The diverter valve of claim 11 wherein a said sealing member is disposed about only one of said pair of upstream housing ports.
13. The diverter valve of claim 12 wherein said upstream housing port having a sealing member disposed there-about is transversely in line with said trio of sleeve openings.
14. The diverter valve of claim 12 wherein a said sealing member is disposed about each of said downstream housing ports.
15. The diverter valve of claim 11 wherein in each operative position of said sleeve, a plurality of said sleeve openings and their associated connectors are in unregistered position relative to a said housing port.
16. The diverter valve of claim 15 wherein:
(a) in one operative position of said sleeve:
(1) two of said trio of sleeve openings are registered with respective housing ports and the other of said trio of openings is in unregistered position, (2) and said further sleeve opening is in unregistered position, (b) and in the other operative position of said sleeve:
(1) only one of said trio of sleeve openings is registered with a said housing port, with the other two of said trio of openings being in unregistered position, (2) and said further sleeve opening is registered with a said housing port.
(a) in one operative position of said sleeve:
(1) two of said trio of sleeve openings are registered with respective housing ports and the other of said trio of openings is in unregistered position, (2) and said further sleeve opening is in unregistered position, (b) and in the other operative position of said sleeve:
(1) only one of said trio of sleeve openings is registered with a said housing port, with the other two of said trio of openings being in unregistered position, (2) and said further sleeve opening is registered with a said housing port.
17. The diverter valve of claim 15 which includes filler means disposed within said external chamber and disposed for engagement by said connectors when the openings associated with the latter are in said unregistered position.
18. The diverter valve of claim 17 wherein said filler means comprises a plurality of filler elements disposed on the inside of said longitudinally extending housing wall adjacent the unregistered positions of said openings.
19. The diverter valve of claim 18 wherein said connectors and said filler elements include precision surfaces adapted to matingly engage upon placing of an associated sleeve opening in unregistered position.
20. The diverter valve of claim 18 wherein said connectors and said peripheral sealing members include precision surfaces adapted to matingly engage upon placing of an associated sleeve opening in registered position with a said housing port.
21. The diverter valve of claim 18 wherein said filler elements and said peripheral sealing members include precision surfaces adapted to intermittently matingly engage with like precision surfaces on said connectors.
22. The diverter valve of claims 19, wherein said precision surfaces, when matingly engaging, form fluid flow restrictions.
23. The diverter valve of claim 22 which, when connected between an upstream source of pressurized fluid and a downstream process device has a pressure differential between said internal and external chambers, and wherein said flow restrictions are of sufficient width so that fluid continuously flushes through said restrictions unidirectionally in both operative positions of said sleeve.
24. The diverter valve of claim 22 which, when connected between an upstream source of pressurized fluid and a downstream process device, provides means for causing continuous flushing of freely exposed precision surfaces in all positions of said sleeve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US315,290 | 1981-10-27 | ||
| US06/315,290 US4445540A (en) | 1981-10-27 | 1981-10-27 | Sleeve-type fluid flow diverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1188198A true CA1188198A (en) | 1985-06-04 |
Family
ID=23223743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000405037A Expired CA1188198A (en) | 1981-10-27 | 1982-06-11 | Sleeve-type fluid flow diverter |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4445540A (en) |
| EP (1) | EP0077880A1 (en) |
| JP (1) | JPS6018872B2 (en) |
| CA (1) | CA1188198A (en) |
| ZA (1) | ZA824562B (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520847A (en) * | 1983-08-30 | 1985-06-04 | Water Services Of America, Inc. | Fluid flow diverter disc valve |
| DE3340400C2 (en) * | 1983-11-09 | 1985-12-19 | Kalvo-Vogler GmbH, 5650 Solingen | Rotary valve |
| DE3430860C2 (en) * | 1984-06-15 | 1994-08-25 | Mesroc Gmbh | Multi-way valve for diverting flow directions and / or regulating the flow rates of gaseous or liquid media carried in piping systems, in particular in tubular heat exchangers |
| ZA85553B (en) * | 1984-12-05 | 1986-05-28 | American Water Services | Fluid flow diverter valve with improved flow-through construction |
| US4653537A (en) * | 1986-03-20 | 1987-03-31 | Water Services Of America, Inc. | Fluid flow diverter valve with improved chamber arrangement |
| DE3727467A1 (en) * | 1987-08-18 | 1989-03-02 | Mesroc Gmbh | 4-WAY ARMATURE TO REFLECT THE FLOW DIRECTION OF MEDIUM, LIQUID OR GAS-BASED MEDIA IN PIPELINE SYSTEMS |
| US5167254A (en) * | 1991-04-23 | 1992-12-01 | The United States Of America As Represented By The Secretary Of The Army | Adsorber switching valve |
| US5549010A (en) * | 1995-01-13 | 1996-08-27 | Ziba Design, Inc. | Readily serviceable ancillary fluid filtration system having visual flow rate indicator and quick-release fluid hose fitting |
| US6000235A (en) * | 1997-12-02 | 1999-12-14 | Gas Research Institute | Absorption cooling and heating refrigeration system flow valve |
| FR2827361B1 (en) * | 2001-07-11 | 2004-11-05 | Valeo Thermique Moteur Sa | SAFETY OPERATING CONTROL VALVE FOR FLUID CIRCUIT |
| SE520124C2 (en) * | 2002-07-31 | 2003-05-27 | Marinnovation Hb | Backflush valve for pipe connected to heat exchanger, contains flow passages inside and around valve body |
| US7631661B2 (en) * | 2004-08-23 | 2009-12-15 | Zhejiang Sanhua Co Ltd. | Straight flow reversing valve |
| DE112004003045A5 (en) * | 2004-11-24 | 2007-10-31 | Hauck, Bernhard | Multiway valve |
| DE102010024871A1 (en) * | 2010-06-14 | 2011-12-15 | S+J Armaturen Gmbh | Piggable multi-port valve for piggable distributor, has cylindrical valve including piggable passages arranged in cavity within valve, where cavity is connected with apertures in valve, and apertures are equipped with stops |
| US20140290659A1 (en) * | 2011-12-14 | 2014-10-02 | Koninklijke Philips N.V. | Reversing valve and high frequency oscillation airflow generator |
| US9382833B2 (en) * | 2013-07-25 | 2016-07-05 | Schaeffler Technologies AG & Co. KG | Actuation system for multi-chamber thermal management valve module |
| DE102015210241A1 (en) | 2014-06-05 | 2015-12-17 | Schaeffler Technologies AG & Co. KG | Rotary valve with an insulating distribution body |
| WO2016009748A1 (en) | 2014-07-18 | 2016-01-21 | 三菱電機株式会社 | Air conditioner |
| WO2016009749A1 (en) | 2014-07-18 | 2016-01-21 | 三菱電機株式会社 | Heating-medium flow-path switching device and air conditioner provided with same |
| CN106574731B (en) * | 2014-08-22 | 2019-12-10 | 三菱电机株式会社 | Combination valve |
| CN105215067B (en) * | 2015-10-12 | 2017-03-29 | 贵州航天南海科技有限责任公司 | A kind of cooling device for wire drawing machine with antirust descaling function |
| US11719350B2 (en) * | 2019-06-12 | 2023-08-08 | Vitesco Technologies USA, LLC | Coolant flow control module |
| RU2720060C2 (en) * | 2019-08-28 | 2020-04-23 | Вячеслав Петрович Рябинин | Hatch-cock |
| RU194491U1 (en) * | 2019-09-10 | 2019-12-12 | Вячеслав Петрович Рябинин | HATCH CRANE |
| CN112212033B (en) * | 2020-09-07 | 2021-07-13 | 东风汽车集团有限公司 | Four-way valve and control method thereof |
| US11592116B2 (en) * | 2020-11-25 | 2023-02-28 | Robertshaw Controls Company | Five port valve |
| CN116261637A (en) * | 2021-01-18 | 2023-06-13 | 杭州奥科美瑞科技有限公司 | Control valve |
| CN112892062B (en) * | 2021-01-22 | 2022-05-10 | 深圳市金利源净水设备有限公司 | Tap and water purification unit |
| US20220316607A1 (en) * | 2021-04-01 | 2022-10-06 | Shubhada Surve | Nine Port Cooling Valve |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD32200A (en) * | ||||
| DE832819C (en) * | 1945-01-23 | 1952-02-28 | Ernest August Stienen | Rotary valve |
| CH328844A (en) * | 1955-02-07 | 1958-03-31 | Walter Franke Fa | Reusable rotary valve |
| FR1172520A (en) * | 1955-12-21 | 1959-02-11 | Auxiliaire De L Ind Et Des Min | Improvements made to devices, such as valves, with sealed distributors, in particular for vehicle braking circuits |
| US3128793A (en) * | 1956-03-09 | 1964-04-14 | Rockwell Standard Co | Selector valve |
| CH426905A (en) * | 1961-06-02 | 1966-12-31 | Maschf Augsburg Nuernberg Ag | Method and device for cleaning surface tube condensers and other surface tube heat exchangers |
| US3194267A (en) * | 1962-02-02 | 1965-07-13 | Filtration & Water Softening P | Rotary control valve for filters |
| US3211217A (en) * | 1963-07-12 | 1965-10-12 | Westinghouse Electric Corp | Fluid reversing valve structure |
| US3973592A (en) * | 1975-01-27 | 1976-08-10 | Water Services Of America, Inc. | Fluid flow diverter |
| CH583393A5 (en) * | 1975-08-22 | 1976-12-31 | Keusch Paul | Two position switch over valve - has two inlets and two outlets to reverse flow to clean filter |
-
1981
- 1981-10-27 US US06/315,290 patent/US4445540A/en not_active Expired - Fee Related
-
1982
- 1982-06-11 CA CA000405037A patent/CA1188198A/en not_active Expired
- 1982-06-25 EP EP82105661A patent/EP0077880A1/en not_active Withdrawn
- 1982-06-25 ZA ZA824562A patent/ZA824562B/en unknown
- 1982-06-30 JP JP57113798A patent/JPS6018872B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6018872B2 (en) | 1985-05-13 |
| EP0077880A1 (en) | 1983-05-04 |
| US4445540A (en) | 1984-05-01 |
| ZA824562B (en) | 1983-12-28 |
| JPS5884291A (en) | 1983-05-20 |
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